/usr/include/musicbrainz3/entity.h is in libmusicbrainz3-dev 3.0.2-2.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* MusicBrainz -- The Internet music metadatabase
*
* Copyright (C) 2006 Lukas Lalinsky
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id: entity.h 9216 2007-06-25 19:42:20Z luks $
*/
#ifndef __MUSICBRAINZ3_ENTITY_H__
#define __MUSICBRAINZ3_ENTITY_H__
#include <string>
#include <musicbrainz3/musicbrainz.h>
#include <musicbrainz3/lists.h>
#include <musicbrainz3/relation.h>
#include <musicbrainz3/tag.h>
namespace MusicBrainz
{
/**
* A first-level MusicBrainz class.
*
* All entities in MusicBrainz have unique IDs (which are absolute URIs)
* and may have any number of relations (Relation) to other entities.
* This class is abstract and should not be instantiated.
*
* Relations are differentiated by their \e target \e type, that means,
* where they link to. MusicBrainz currently supports four target types
* (artists, releases, tracks, and URLs) each identified using a URI.
* To get all relations with a specific target type, you can use
* getRelations and pass one of the following constants as the
* parameter:
*
* - Relation::TO_ARTIST
* - Relation::TO_RELEASE
* - Relation::TO_TRACK
* - Relation::TO_URL
*
* @see Relation
*/
class MB_API Entity
{
protected:
/**
* Constructor.
*
* This should only used by derived classes.
*
* @param id a string containing an absolute URI
*/
Entity(const std::string &id);
public:
/**
* Destructor.
*/
virtual ~Entity();
/**
* Returns a MusicBrainz ID.
*
* @return a string containing a URI
*/
virtual std::string getId() const;
/**
* Sets a MusicBrainz ID.
*
* @param value a string containing an absolute URI
*/
virtual void setId(const std::string &value);
/**
* Returns a list of relations.
*
* If \a targetType is given, only relations of that target
* type are returned. For MusicBrainz, the following target
* types are defined:
*
* - Relation::TO_ARTIST
* - Relation::TO_RELEASE
* - Relation::TO_TRACK
* - Relation::TO_URL
*
* If \a targetType is Relation::TO_ARTIST, for example,
* this method returns all relations between this Entity and
* artists.
*
* You may use the \a relationType parameter to further restrict
* the selection. If it is set, only relations with the given
* relation type are returned.
*
* @param targetType a string containing an absolute URI
* @param relationType a string containing an absolute URI
*
* @return a list of pointers to Relation objects
*
* @see Entity
*/
RelationList getRelations(const std::string &targetType = std::string(),
const std::string &relationType = std::string()) const;
/**
* Adds a relation.
*
* This method adds \a relation to the list of relations. The
* given relation has to be initialized, at least the target
* type has to be set.
*
* @param relation a pointer to Relation object to add
*/
void addRelation(Relation *relation);
/**
* Returns number of relations.
*
* This is equivalent to \c getRelations().size()
*
* @return an int containing number of relations
*
* @see getRelations
*/
int getNumRelations() const;
/**
* Returns an relation specified by index.
*
* This is equivalent to \c getRelations()[index]
*
* @return a pointer to Relation instance
*
* @see getRelations
*/
Relation *getRelation(int index);
TagList &getTags();
int getNumTags() const;
Tag *getTag(int index);
private:
class EntityPrivate;
EntityPrivate *d;
};
}
#endif
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